Improved grain-screen



H. oeBoRN.

Grain Screen. y No. 45,746. Patented Jan'. 3. 1865.

UNITED STATES PATENT OFFICE.

HARRISON OGBORN, OF RICHMOND, INDIANA.

IMPROVED GRAIN-SCREEN.

Specification forming part of Letters Patent No. 45,740, dated January 3, 1865.

To all whom t may concern Be it known that I, HARRISON OGRoRN, of the city of Richmond, of the county of V-ayne and State of Indiana, have invented a new and useful Machine for Screening Grains and Seeds; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a plan or top view of my invention. Fig. 2 is a centra-l side elevation taken in the red line a' x. Fig. 3 is a sectional side elevation, taken in the line y y.

Letter A A is a suitable frame to support the working parts ol' my machine.

B is ahopper for holding the grain to be cleaned, as is clearly shown in Fig. 2, in which there is a sliding board, F, for opening and closing the dischargeoriiice in the hopper, which board is held in any position desired by the pin C to regulate the tlow of the grain upon the riddle G H is a staple, iirmly fastened to the screen I, through which a reciprocating -motion is communicated to the riddle G and screen I.

J, Fig. 3, is a grooved eccentric cam, attched to frame A A in any convenient manner, so that it can be easily rotated by hand or any other convenient power, the use and ottice'of which is to communicate to the lever K a horizontal motion, and through it the same motion to the riddle G and screen I.

K is a lever, through which a motion is communicated to the riddle G and screen I. rl`he inner end of this lever passes through the staple H in a loose manner. rIhe central part ot the lever is supplied with a series of holes, S S, for receiving a screw, T, or other suitable fastening, to forni a loose joint, so that by putting the screw nearer the outer end of the lever a greater horizontal Inotion is given to the riddle and screen, and putting it farther from the outer end gives the riddle and screen less horizontal motion, and thus regulating the motion ot' the riddle and screen to suit the kind oi' grain or seed being cleaned. rIhe outer end of the lever is supplied with a friction-roller, L, which runs in the eccentric groove J, while the lever K is held by a staple, M, or any other suitable deice, from moving in a vertical direction.

N is a Washer placed between the eccentric grooved cam J and frame A A', to prevent any unnecessary friction.

O is a bar supplied with a hole near each end, and placed a little below screen I, against which the screen I will gently strike to pre- Vent its clogging or becoming foul, as I will hereinafter explain.

P is a pin fastened iirmly at the lower end in some rigid part of the frame A, and passing loosely through the hole Q in bar O, on which pin is placed a washer, It, which may be left on the pin or taken oft' to adjust the height of the bar O, so the screen will strike it lightly or heavily, as may be wished.

G is a short riddle placed directly beneath the discharge-orifice of the hopper, for screening out all light, chaft'y matter and other foreign substances. h

I is a long screen supplied with' suspending-straps E E E E, one end of which is attached lirmly to the screen I, the other end being supplied with a series of holes, V V, any one of which may be iitted over pins W W to adjust the position of the screen I.

In using niy invention, the grain to be cleaned is poured into the hopper B, and the discharge-orifice ot' the hopper being opened by the rising of the board F, the grain is allowed to fall directly upon the riddle, G and through it onto the scrteu I, when,the eccentric grooved eamwheel being rotated, the lever K will be forced to move, horizontally, thus causing` the riddle G and screen I to be moved quickly back and forth in a horizontal direction. The coarse particles will be thus moved to the lower and outer end of riddle G, where they will i'all to the floor. The liner particles and the grain will fall through the riddle G onto the screen I, where the screen I will et't'ectually screen the grain. The pure grain will fall upon the floor at the lower end of the long screen l, while the small particles ot' refuse'niattcr will fall through screen I onto the tloor, thus prod ncin g the most perfect results.

Having thus described the nature, construction, and opera-tion of my invention, what I claim therein as new and useful, and desire to secure by Letters Patent, is

The cam-wheel J and lever K, in combination with the riddle G, screen I, and adjusting-straps E, the several parts being constructed, arranged, and operating substantially as and for the purpose set forth.

HARRISON OGBORN.

Vitnesses:

CHARLES D. SMITH, Moon SCHEITIIN. 

